near to Newark on Trent, Nottinghamshire, Great Britain

The East Coast Main Line and Lincoln to Nottingham lines cross here. It is the fastest flat crossing in the UK, trains are allowed to cross at 100 mph (note sign). The crossing is in fact a diamond shape. Newark Dyke bridge is seen in the distance, the bridge is only just over 10 years old.

The East Coast Main Line is a 393 mile long high speed electrified railway between London and Edinburgh, via Peterborough, Doncaster, York and Newcastle. It was constructed between 1846 & 1871 by several different rail companies.
Wikipedia: Link